Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6521278b309381c7c1760cad18658fd03b805acbca38bf2b4b25ffdec42cd774' 
  AND token = 'EdiGQ64kQqqThkA+BJ3m/3nsu6InXadAwn8COpXBE2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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