SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5c25177c2b5f033c38bbf524f84ee3d9ced7340160057c5e8554f23d5f97abb4' 
  AND token = 'wF2zaw1J9NY0KjOO9n6M8/vEo/y9FvPLVbuzvzysazc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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