Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2cb975b8beacce506e21b1cbea01ae0f6ff6f187bb3a7de068ca8d177f98fedd' 
  AND token = 'RPhZPztWPS6usgP6N709pm/RMNjQyZW/8QZ8/Fu5bx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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