Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a7c829ae23e1518711e548987313b9a22c73a2fcb3a2b0931c3c3a8a4b86d9b' 
  AND token = 'UG93OaIN0Qn9U33uKWigdLWqRGh/043iwDAkEMKH7GY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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