Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'dcdb2e5e25636533f41ddcd0d860b82147c329828ec7a1d52d7f9f5defbea8c4' 
  AND token = 'AU0SLNjVHxgCtsCQINru+it4fRuCYfvCaIYjmZ1voAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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