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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c664970bf0f528c28b30f8c3ba95bb08634f1d4d525443378fd1ec6b367a01e' 
  AND token = 'yfg1pYagIq7d4x/KJnke4It4IaJj98VzIQgjY9I4yYQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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