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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f60fdfd47733d75f4e9efbb2729ac3266ddf4ba8c00196caff93473fc45d96c9' 
  AND token = 'cMFX7FWz58X1N3CXumD4DGq2wZxWFIYYebwI6TUEx6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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