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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2499faa030bec108ddce37054c0d69e6d773cdec4304c80669deb281c323eb9d' 
  AND token = 'XN6ytRv3kKPQyRaL8lBvz7u8e2OzezKKZ0dX7odF/Ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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