Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '579b3a6ab892873c977bd0c4ee826cdfc9a67efe36af14a020394dc9296e3a8a' 
  AND token = '+8OCrBZLr9sWCAIO4oJ0R3i2+Te1dBtS/qkCl2qCof4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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