Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2976b3b782b53d6390c866ce3e2a146bf8bc57e046a3654108ad5caba977971b' 
  AND token = 'AeKyVym6MiDojghLRPerD3u3K83PmqlL/oZU+z3j4UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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