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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '229d05fa6d29ccb571b3e8cb6bfc6bd29a7b75cb1ecc3eaa03ae6f041d290d1e' 
  AND token = 'g9J8+R5dkWIRvQzm/la1/kFs5kXOULYlYttaQa0T5a4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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