SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67318fbcbc565ae352f7232792abfe5452d3fe1c625ffe939a144a44552e4429' 
  AND token = 'LJyhIIDqPDBty7Xv/9iBKxFuhRYj7ja1gNOKNXBJYN8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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