Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0b0c53ca6d7e474356e9690555cf2979fb4907a0cd72a4a7009f2ad50a96933b' 
  AND token = 'PHE21R31U6EiSvnO5ybybZ5CauPhNjTgT5pqMChnVB0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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