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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bdc641b4efe6d10afa3af4a5874e31ef99191a0bc1242d025618644b5cf5ff80' 
  AND token = 'iLs/rP3nz9UWWVby/3pcpil2C9A7xkb9SEEfx+FUVwo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}