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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c580c41c7e9fc709961f590a5b7110ba6296d72a8f2fea21e4d8cdff2eeb83c9' 
  AND token = 'TTDsGaXJEBqZsCoIH3yCm7O0GUlPNOpq8jrJOcPbAOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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