Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fc2ae6224498a3d14b589db167568dd1780434db4906edc31618712783da6392' 
  AND token = 'MDcNfuyARNB7R/HiTqvVyJ2H8bIeFY7fDprD3xgkFAA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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