Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4b6a9411cb51d0f36a6c4c289029cdd69a0f26d8ae46eb7d7d593219329ed41' 
  AND token = '2c+nXoLA57ENPU2HFvJzZ0ELG1ZZshY895rrvhbr/LM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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