Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83c436fe0c4498bb952a1762b4c1b62a2574eb4245473dd27a88595d8789e145' 
  AND token = '6P6LeMJkWfkE2j+HAw4rCmcaI985yXDbN6fXyI6Lw2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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