SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ba1ac42c5bedef37b7c328fa63783a85e75158db9982ad5c287714f819f16d3' 
  AND token = 'EFU7u5vRd+Pk2AqJVrROBLdBOAK0etsk5J0G8hPquqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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