Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6652612a87bcfe6725f4fb63ecc8ea632053018297d891a1bc0cb9ea30ee3a0' 
  AND token = 'k3TW0eOTmCP6aUG9BysGmHnxTmSysU/L/oOMFPgO4uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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