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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05781d913a75ab0b739c1fc44c238fadc97d5ac2a9a772772009643a4e68f322' 
  AND token = 'nfFIG4gDrQ2nRsiNiuSXxJUXQS7oxqVZErh5XjzbuF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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