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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e70d9cbb78d52654c9d898a1c762514e4d02a9743d5d440fca5f03bb0c9fed' 
  AND token = 'VjjytubuXfN3eljw7ZTLjjfShvDgFvLMs2tO0GE4VD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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