Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '76dbf129b4c25323c74c6592de9b22a6f6ce335cb7edabcceaa72c849c7815b8' 
  AND token = '//mnPA90e2/kI1R/Q9XpEEwEsWpQYwROHG/6jcnoo38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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