Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbc742fe0eb06d892c0217d3f18b36da0ad0824255cebd6bf52fbdc26d1188b4' 
  AND token = 'bjl7oEb/CTbsaxIOVplkL4+zgS+OPgROw7oWVO7hCr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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