Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b341865b40e356d081607511ae7a273412e3c1bc5e042ad2239c2f89c9bb0d89' 
  AND token = '+j/HToQ8vz+z8GEJ3BGmjoIJkyOKRLNJeW4cLybdOWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}