Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '48892c78b48ecbf18729c1c2db08fee079b700c38c0907730728a50c49ac256d' 
  AND token = '3Av1eMSbcv3iu1LNCtv0J7smpq/7XM8Y1vX6q1W6yUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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