Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5996566ecebc616f685f7ea8ccafa82b7772fbb45183617e307e242d4cca05f' 
  AND token = '/JXyHKq0DsTeRs291dTu1VOh1T81Sh+aiN/YGldxtdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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