Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49ab4506d25739ad0d8da4108c47dc1098e8c10a342ce50a7113c1bc12dd42ab' 
  AND token = 'ql9DIQRxY6j7XPgfLrfcnwn2NY9yaeRLVlm0lQ5cl04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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