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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98c7a4d7e064d353a1d97b11aed35e41de914f3e7d13e40f0f8c8af9674ceea9' 
  AND token = 'jGGkTAgTNt6AbuLi24/ExqHCE83Pqq1UT4RorgmBWoo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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