SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c09579736e9da23a57597b8318595959401875fa90d5b6755fc3de68e41473f9' 
  AND token = 'GZpkIpC9gH/qxEOsLd3KzhddqSnmyNSRYwNsqqd8kHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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