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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5ceb67735605c6f7de42e441edfac425282ed52ccaa9ec9fc43a0199aaf8c715' 
  AND token = 'X2trDczJlbQXcv6MkHD5T0bo++QBdOgW1maLep9Gkew=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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