Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7dc5653f2625cc26cc35eb3e6ce1aee036f2dec17e4571df10b0b48efbb86f3' 
  AND token = '5zvAEFPcR5nchZisT0N1oB46R1DNhc0GbvY+8nAsosw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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