Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b80cd063103ba29716bba43d27f0635ac949de2b92d33700913c3be780b28a36' 
  AND token = 'tRWSnBRkoR90TDUGHIXzRDtsl8BZJQN4ej0GvtwCF8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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