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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '364edd82908f446c5c8d6852a6128c232f846ad17a090ee086bc14f8a2998ea5' 
  AND token = 'okqBYd1hXJiX7NDho1uR5KKhZGWvk7AqTu6mtuyI1n0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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