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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c9c6df2d9bdebe7cf768ca1286f4d6fe3bc573e1fa7e82422fc12636811c7b7' 
  AND token = 'cLPlBknpkHScakaV6w1Gqtja5KGXmzvqCds9wtLQ8oI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}