Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2fb8e4eb13eedae6acfc1b862e0e8509a84d06fa64c90738f3b4cd766b069ae' 
  AND token = 'Yut3iz+AJUAEjk2x4IlLDLnslkd2TrVRw0vSlER021c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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