SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89df173b2108856a3d1d80d78f5ee5aeff2fb3adf7c9e1c8c3ad177e44b77eb6' 
  AND token = 'VpSkL0F5uE+RLH0t3vlO/n5ql2Y9uEjOzzqHSRhqExg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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