Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf9cfe25fb33a30da758ec7e48d5f1167abb1b42ac28b983c79cca31ad8388e' 
  AND token = 'D9L5ndEdr75qK73ZP69DOjSlRoXf+9noT4iBf2hz+dc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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