Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f25959d378a4db9eaa64a357af186bfcf642b524f34a5d0baab7df75cfcb6a12' 
  AND token = 'gIRtoOPCOp/7DyRadH2lnIso242UZDO+qRAo0NvqZE4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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