Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'befa0b623144505fd9b0f924a1a2896b580c1d5607db6e4f1bf03d6af7c5fe41' 
  AND token = '0KlXTVYqMBZvIVAK6JdaMQc89yOa3OYEs4iD4A4I7x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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