Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '049163eeaf207cf1e33c26df6948cd4986e091020431d313523955324130c704' 
  AND token = 'FCWHFjIrsUX2oqbw2m5GkkHs9ozU29czGS3rJskjlKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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