SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ca236bbf75bdc543c85c2ca191eece3a943cbe4186a3df62b8f5962792e0004' 
  AND token = 'NvoY+KMLfqSkB7jFv8e3Zvr7E3EjQqH1z/9TtdxiJiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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