Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c0894a6b17e5e7e8a6d4df40f0716bef9cbcef4f2513a73bc10c93a1d8102dcd' 
  AND token = 'vyBsuamrEeOEmNx1VPVZT7K/2KnycKi2kIC4y4cvYnA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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