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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '018ff1499f3176d6db82cf961a95571a442fafe1da6b5a4bf695e2e1b4f83f5f' 
  AND token = 'miH0Ht44yCOwIdDDrWgAvnc3xTD7wp0qic28+OrcdAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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