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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '838de3b237609c188d8e019c237648bef5d8b2658f095b3abca6899edb0d572d' 
  AND token = 'K7dtvjCIyo7Z0YF6iTkxeAByWyu+H4iwPI1KngamlMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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