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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65d19872c580d5da84cdc8aed45713eaef362d36de2c17bf4447e1295eee2b2f' 
  AND token = 'COg3IZ9Fzx8HWi9k0Xf1Tc2kKCp0DDiQRnNfk71eYUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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