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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '118fc7903fb8d0ec15dfbeced23ceb0b48c920dfa7454c5672f08499b9a35511' 
  AND token = 'tHWJJly9+PVK15g0QDB6rd4RHScTo2Uc3b/4OclwhBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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