Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1537c27614ec083a1cf68dc2cd4c6bc606ea97e1e9393bc009b3510dc6fd638e' 
  AND token = 'dfFsESlBjlxypTNIw6+rH5/OM4DBvGCiGRfS9dnAxrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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