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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aedd4e0dae240fe82d23d9d69d834246ad5308091ec61888a3717a3eafad8e63' 
  AND token = 'NiEMXHRy+/csEg48jYOJUf1V9RQCHE0IDooIlsetFtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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