Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abf3b6c6511fc145e62a07c952a0d74c8dc3df053a84dedb884042c08c01cd21' 
  AND token = '3o9/P7HvnYm7b0z7mti94QIYfkB0YNvzTcqRZNm14o8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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