Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ad9c3a7b1149985981e9bb19151670572ef9d24520f6a88dff0379fcce08ab2' 
  AND token = 'JP0K1+B31p8T76YxLMO+9rOlZs6ILRG3J7uWZRhf0aA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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