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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2220f1f1e5732d63737223a9f7ef0e7d58f5e95a7110897af4500ffa5adf7a8' 
  AND token = 'ppJ626KTNS1RA36o/VrDAlxQmqDS9fyl+qRg/IC5bzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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