Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab142a5591de063af2dbb02d63ccf1558e505addf184d9d6d4dcb0262d255b7e' 
  AND token = '27q7xSq4BVDxZQkefivEQ01fhrw+X++4Ku+s9hpyygM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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