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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62099c5d57067ab6c388ea18c28a7b5c8a230535228c16ee421b12be8189a150' 
  AND token = 'Jd2yxMLQe9MWEH91OjY+2HfhVXQqb4ySfSAzmwR+cq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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