SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ee32063e2621181aff0d8b1a2c080a90d7a9696013a4f740bcf6e2987dfd689c' 
  AND token = 'cBuUIEUYZL8GH5KXDjZHLhj1nwkk5O4jvVGrM5VfFsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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