SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e1b8df542a83e3de1aeb5616afc86492397cd92093f9c6649c24015575baf6e' 
  AND token = 'pq6m7BpGfH4iPqAq9+7YGazOQVBEvXVHBfv9nxbP1tk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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