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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '90ea528915ad33209f5a10b58745e5abe89376ae38a00ceb0b4d295c05634ea1' 
  AND token = 'bg6Sw4bmtVefRblkpekm1vK+6t8tR881usHUeEaCaY8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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