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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01740ee999bf25fcc0fcd5aab9fbcf985fe33bd86a07ba3e71ef9d01df99d578' 
  AND token = 'K8yNnYWGQY7QiYhRFvM/lsNvvQ3iq1pUr18V1ioE23w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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