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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '58c8a8a044cc8053ae9ac67b5dcb66006d8a9987996e6f44f2dd56d92e01fc25' 
  AND token = 'dlW9MSOqDKoV220uofsa934vFTbHnEtIhgc3ggJDkTw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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