Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e26fadd9a40164e828cec74b4870927fcdfcf88d0c4fc13e1ec6aecc1b19fc45' 
  AND token = 'ujM/DHns1TTRjMJdzUxU+2RtobhizsGP1mkwx8EuelA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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