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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d792524d40312ab69c9153e1686ea94de233ea87c5f266379c77bb6be5ca7ea' 
  AND token = 'BSyK2jJgIcR6fBZhYCKmaZs4xeN847yDTMe22Zj8O6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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