Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3b1aec64246eaa811c206d53f6b2e3ac0d556002a9b0d3e58e890431c16e4f61' 
  AND token = 'cX37TE2f+7PuU/XsnpvczcYaRfURnzgxmZw2xxQmT7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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