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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'aec75711b167ec286b187e2a95554ce9016893b4c191f199b58e5ca0aeed0793' 
  AND token = '//EX3hoDSGamGa6e8L2qutu7+dJ/xUcb4hkGOz1SWKo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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