SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1807123bf9df3f777848d73a826b3625e6fe35f1e0c33d2e7836c4a09880649e' 
  AND token = '3BP6n+R/JbYlBNsfZECd2OrEYRYiILpWzqFchV3J7Ik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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