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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a710e7729963d1f6f365eae40fc6c4e7c65b618aea76592d5931f8544921b914' 
  AND token = 'woff2lUyU8claRdJNyHL0Xu/DQx/hmM13Njq+bimkWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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